Ski boot



FIG. 1 is a right side view of a ski boot, showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a left side view thereof, shown in the opened condition;

FIG. 4 is a top view thereof;

FIG. 5 is a top view thereof, shown in the opened condition; and,

FIG. 6 is a bottom view thereof. 

CLAIM The ornamental design for a ski boot, as shown and described. 